WO2016196984A1 - Machines portatives à moteur à modes de fonctionnement sélectionnables par l'utilisateur - Google Patents

Machines portatives à moteur à modes de fonctionnement sélectionnables par l'utilisateur Download PDF

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Publication number
WO2016196984A1
WO2016196984A1 PCT/US2016/035807 US2016035807W WO2016196984A1 WO 2016196984 A1 WO2016196984 A1 WO 2016196984A1 US 2016035807 W US2016035807 W US 2016035807W WO 2016196984 A1 WO2016196984 A1 WO 2016196984A1
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WO
WIPO (PCT)
Prior art keywords
power tool
hand
electric motor
held power
motor
Prior art date
Application number
PCT/US2016/035807
Other languages
English (en)
Inventor
Sean C. Ely
Pinhua XIE
Jason Christopher Bartoszek
Joshua Odell Johnson
Warren A. Seith
Vikram Madineni
Timothy Richard Cooper
Original Assignee
Ingersoll-Rand Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ingersoll-Rand Company filed Critical Ingersoll-Rand Company
Priority to CN201680031738.1A priority Critical patent/CN107635726A/zh
Priority to EP16804555.7A priority patent/EP3302882B1/fr
Publication of WO2016196984A1 publication Critical patent/WO2016196984A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/008—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with automatic change-over from high speed-low torque mode to low speed-high torque mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/0004—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
    • H02P23/0027—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control using different modes of control depending on a parameter, e.g. the speed

Definitions

  • Patent Application Serial No. 62/171,504, filed on June 5, 2015, and U.S. Patent Application No. 15/172,501, filed June 6, 2016, entitled “Power Tools with User-Selectable Operational Modes.”
  • the subject matter disclosed in the above-referenced applications is hereby expressly incorporated by reference into the present application.
  • the present disclosure relates, generally, to power tools and, more particularly, to power tools with various user-selectable operational modes.
  • Power tools typically include a trigger designed to be operated by a user to control the amount of power delivered to a motor of the power tool and, hence, the amount of motive force delivered by the motor to an output spindle of the power tool.
  • a trigger designed to be operated by a user to control the amount of power delivered to a motor of the power tool and, hence, the amount of motive force delivered by the motor to an output spindle of the power tool.
  • Many power tools on the market today rely solely on the user to actively adjust the speed and duration of run time of the tool by manipulating the trigger.
  • an illustrative embodiment of the present disclosure provides a hand-held power tool which comprises a housing assembly, an output spindle, a motor endbell, and a controller.
  • the housing assembly supports an electric motor having a rotor configured to rotate when the electric motor is supplied with power.
  • the output spindle protrudes from an output end of the housing assembly, and is functionally coupled to the rotor such that the output spindle rotates in response to a rotation of the rotor.
  • the motor endbell is located on the housing assembly adjacent the electric motor and opposite the output spindle.
  • the controller is operable to determine phases of a fastening operation in which the hand-held power tool is operating.
  • the phases of the fastening operation of the hand-held power tool comprise two phases including: (1) a continuous run phase and (2) an impacting phase.
  • the continuous run phase is characterized by a first rotational speed, continuous rotation, and low output torque of the output spindle until the output spindle experiences a threshold rotational resistance from a fastener being rotated by the hand-held power tool.
  • the impacting phase begins once the threshold rotational resistance from a fastener being rotated by the hand-held power tool occurs.
  • the impacting phase is characterized by the output spindle experiencing intermittent rotations at a second rotational speed that is a lower speed than the first rotational speed, and is at a higher output torque.
  • the phases of the fastening operation are determined by a current drawn by the electric motor, and wherein during the impacting phase, the motor draws more current than during the continuous run phase; the phases of the fastening operation are determined by the controller from the group consisting of at least one of detects a speed of rotation of the electric motor using an electromagnetic field from the electric motor, monitors output of an encoder positioned adjacent the rotor of the electric motor, monitors output of a resolver positioned on the rotor, and monitors output of at least one Hall-effect sensor positioned in proximity to rotor magnets on the electric motor; the phases of the fastening operation are determined from the group consisting at least one of the controller identifies deceleration of the rotor of the electric motor due to an increased motor load, an electric motor drive identifies an abrupt change in motor torque by monitoring control loop error values; the controller monitors battery voltage; the controller monitors output signals of a microphone positioned in the hand-held power tool
  • a handheld power tool which comprises a housing assembly, an output spindle, an electric motor, a motor endbell, and a user interface.
  • the housing assembly supports the electric motor having a rotor configured to rotate when the electric motor is supplied with power.
  • the output spindle protrudes from an output end of the housing assembly.
  • the output spindle is functionally coupled to the rotor such that the output spindle rotates in response to a rotation of the rotor.
  • the motor endbell is located on the housing assembly adjacent the electric motor and opposite the output spindle.
  • the user interface configured to select one of a plurality of operation modes of the hand-held power tool which control the power supplied to the electric motor based on phases of a fastening operation of the hand-held power tool. These phases of the fastening operations are selected from the group consisting of a continuous run phase and an impacting phase.
  • the continuous run phase being characterized by a first rotational speed, continuous rotation, and low output torque until the output spindle experiences a threshold rotational resistance from a fastener being rotated by the hand-held power tool, wherein the impacting phase begins once the threshold rotational resistance from the fastener being rotated by the hand-held power tool occurs, and wherein the impacting phase is characterized by the output spindle experiencing intermittent rotations at a second rotational speed that is a lower speed than the first rotational speed, and is at a higher output torque; a first operation mode of the plurality of operation modes is a standard mode, such that full power is delivered to the electric motor during the continuous run phase and the impact phase; a second operation mode of the plurality of operation modes being a reduced power mode, such that full power being delivered to the electric motor during the continuous run phase and less than the full power being delivered to the electric motor during the impact phase; when in the reduced power mode and when the hand-held power tool impacts,
  • FIG. 1 is a perspective view of one illustrative embodiment of a power tool
  • FIG. 2 is a side elevation view of the power tool of FIG. 1;
  • FIG. 3 is a front elevation view of the power tool of FIG. 1;
  • FIG. 4 is a rear elevation view of the power tool of FIG. 1;
  • FIG. 5 is a simplified block diagram illustrating various components of the power tool of FIG. 1 ;
  • FIG. 6 is a flow chart illustrating of one illustrative embodiment of a process for implementing user-selected operational modes of the power tool of FIG. 1;
  • FIG. 7 is a graph representing the current delivered to a motor of the power tool of FIG. 1 while operating in a reduced power mode.
  • FIG. 8 is a graph representing the current delivered to the motor of the power tool of FIG. 1 while operating in a snug-up mode.
  • FIGS. 1-5 illustrate one embodiment of a power tool 10, more particularly an impact tool 10, that includes a housing 12and a hammer case 14.
  • the housing 12 includes a motor housing 15, a handle 20, and a power source housing 30, among other components.
  • the motor housing 15 encloses a motor 38 (see Fig. 5) configured to provide a motive force and a gear assembly 72 (see Fig. 5) configured to translate the motive force from motor 38 to an output spindle 50 of the power tool 10.
  • the handle 20 extends between the motor housing 15 and power source housing 30 and is configured to be graspable by a user of the power tool 10.
  • Power source housing 30 is coupled to an end of the handle 20 opposite the motor housing 15 and is configured to connect to a power source 34 (see Fig.2), for example, a battery or a source of motive fluid, such as compressed air.
  • a power source 34 for example, a battery or a source of motive fluid, such as compressed air.
  • the power tool 10 is an electric impact tool, which is powered by a battery removably coupled to the power source housing 30.
  • the motor 38 is an electric motor, more particularly a brushless direct-current (DC) motor.
  • the power tool 10 also includes a controller 70 supported in the housing 12 (see Fig. 5), connected to the power source 34, and configured to manage a plurality of processes associated with the operation of the power tool 10.
  • the controller 70 includes a processor, memory, an input/output subsystem, and other components as might be necessary to perform the functions disclosed herein.
  • the controller may be embodied as any type of electronics capable of implementing digital logic.
  • the memory may be configured as a read-only memory (ROM), a random access memory (RAM), a flash memory, or an electronically-erasable programmable ROM (EEPROM).
  • the housing 12 as shown in Figs 1, 2, 3, and 4 includes a number of user- selectable input devices (e.g., triggers, switches, and knobs) configured to allow the user to adjust one or more user selectable features of the power tool 10.
  • the housing 12 includes a trigger 36 positioned on the handle 20 near the motor housing 15, such that trigger 36 may be operated by a user grasping the handle 20 of the power tool 10.
  • the primary function of the trigger is to control the motive force delivered by the motor to the output spindle.
  • Trigger 36 is spring loaded and will default to keeping the power tool 10 powered off.
  • power is delivered from the power source 34 to motor 38 causing motor 38 to rotate.
  • trigger 36 may include many positions, such that the more the trigger is depressed, the more power is delivered to motor 38 and the faster motor 38 rotates.
  • trigger 36 may also be used to control other features of the power tool 10, such as the operation of a headlight or lighting unit 60 of power tool 100. For example, depressing trigger 36 may turn on lighting unit 60 of power tool 10 and supply power to motor 38 causing motor 38 to turn and produce a motive force. In some embodiments, if trigger 36 is only partially depressed lighting unit 60 of power tool 10 will turn on, but motor 38 of the power tool 10 will not rotate, thereby allowing the user to illuminate the work space of power tool 10 before operating power tool 10.
  • Housing 12 also includes a Forward/Neutral/Reverse switch 40 ("F/N/R switch") positioned in housing 12 to be adjustable by the user of power tool 10.
  • the F/N/R switch 40 is positioned in handle of the power tool 10 near trigger 36 and near motor housing 15.
  • the illustrative embodiment of the F/N/R switch 40 includes a forward position, a neutral position, and reverse position.
  • the forward position is configured to cause motor 38 to rotate in a forward direction when trigger 36 is depressed.
  • the reverse position is configured to cause motor 38 to rotate in a backward, or reverse, direction when trigger 36 is depressed.
  • the neutral position disconnects trigger 36 from motor 38, such that even if trigger 36 is depressed motor 38 will not rotate.
  • Housing 12 also includes a rotary knob 42 positioned on a rear portion 18 of the housing 12, such that knob 42 faces the user during normal operation of the power tool 10.
  • Rotary knob 42 is configured to allow the user to select one of a plurality of modes of operation of the power tool 10. When knob 42 is rotated, it passes through a plurality of detents (not shown) that correspond to respective modes of operation.
  • knob 42 includes spring loaded features that engage with the respective detent features of the power tool 10.
  • the spring loaded features on knob 42 may be "leaf spring" type features that are integral to the knob or may be a plurality of components to create a spring loaded feature set (e.g., a sliding plunger preloaded by a coil spring not shown, but disclosed in Provisional Patent Application No.
  • Housing 12 may also have a plurality of grooves to accept the spring loaded features on knob 42 to create the necessary detents that correspond to rotary positions of knob 42.
  • the detent grooves may be incorporated into the rear surface of the electric motor which is adjacent to knob 42.
  • the spring loaded features may be integrated into the tool housing or the rear surface of the motor, and the detent grooves may be integrated into the knob.
  • each detented rotary position of the knob corresponds to a respective operational mode of the power tool 100.
  • Power tool 10 may include user output devices 86 (see Fig. 5), such as indicator lights, to indicate the operational parameters of the power tool 10.
  • indicator lights such as chip-on-board (COB) light emitting diodes (LEDs) are used as indicator lights to provide feedback to the user about the operating conditions of the power tool 10.
  • the feedback provided by such indicator lights may include a battery charge level, an operational mode selected, a reminder to perform maintenance, a fault indication, or an indication of completion of fastening.
  • the COB LEDs may also provide non-functional aesthetic lighting in the power tool 10.
  • the COB LEDs may light up in different colors and/or may blink/flash in different patterns to convey various messages to the user.
  • the user output device is a COB LEDs configured to display the battery charge level as a "bar graph.”
  • the user output devices 86 (see Fig. 5) of the power tool 10 may be embodied as any type of audio outputs, visual outputs (e.g., lights or various screens), and/or tactile outputs, by way of example.
  • hammer case 14 supports an impact mechanism 80 and the output spindle 50.
  • the hammer case 14 includes removable nose piece 32, which supports lighting unit 60 and includes a hammer case electrical connector 62 that is configured to mate with a corresponding housing electrical connector 64.
  • the electrical connector in the housing 64 is connected to the battery and controller 70 of the power tool 10 and is configured to provide power and control signals to the electrical components of the hammer case 14, such as the lighting unit 60.
  • impact mechanism 80 of the power tool 10 may be any type of impact mechanism, such as a ball-and-cam impact mechanism (sometimes called a "Potts" mechanism) or a Maurer impact mechanism.
  • impact mechanism 80 includes an anvil 84 coupled to output spindle 50 and configured to rotate about an output axis 66 and a hammer 82 coupled to the output of the motor and configured to rotate in response to rotation of motor 38.
  • Hammer 82 includes one or more jaws (not shown) that are configured to strike anvil 84, and thereby cause anvil 84 and the connected output spindle 50 to rotate.
  • the illustrated output spindle 50 is formed as a single unitary, monolithic piece.
  • a first end of output spindle 50 extends outside hammer case 14 and is configured to couple to any number of work attachments.
  • a second end of output spindle 50 extends inside hammer case 14 and is coupled to anvil 84.
  • the second end of output spindle 50 may be formed with two jaws to create anvil 84.
  • the jaws of hammer 82 are configured to impact anvil 84 to functionally drive output spindle 50 in response to rotation of motor 38.
  • the term "functionally drive” is herein defined as a relationship in which the jaws of hammer 82 rotate to impact the respective jaws of anvil 84 and, thereby, cause intermittent rotation of output spindle 50. In some embodiments, the impact cycle is repeated twice every rotation of motor 38.
  • Hammer case 14 also includes a removable nose piece 32 positioned to be at the front of hammer case 14 of the power tool 10.
  • Nose piece 32 includes lighting unit 60 and hammer case electrical connector 62 and is configured to keep the mating electrical connectors from inadvertently disconnecting.
  • hammer case 14 may include at least one lighting unit 60.
  • lighting unit 60 on hammer case 14 is a headlight configured to illuminate the work space of the power tool 10.
  • the headlight is positioned in nose piece 32 of hammer case 14 such that it surrounds output spindle 50 and is configured to shine light along the output axis 66, defined by output spindle 50, and illuminate a work space of the power tool 10.
  • Lighting unit 60 includes one or more lights installed in hammer case 14, a protective clear lens 61 configured to prevent damage and contamination to the lights caused by foreign debris, and electrical circuitry to provide power and control signals to the headlight.
  • the one or more lights are COB LEDs formed as an annular ring that surrounds output spindle 50 and illuminates the work space of the power tool 10.
  • the one or more lights are two or more COB LEDs formed as arcs that cooperate to surround the output spindle.
  • the power tool 10 includes one or more user- selectable operational modes that are configured to allow the user to quickly perform tasks while preventing the user from over torqueing a fastener or otherwise damaging a work piece.
  • FIG. 6 a method for implementing the user-selected operational modes of the power tool 10 is shown as a simplified flow chart. The illustrative method comprises determining an operating phase of the fastening operation being performed by the power tool 10 as is indicated by reference numeral 90 and applying power to motor 38 of the power tool 10 based on the operating phase and the user-selected operational mode.
  • Controller 70 (see Fig. 5) of power tool 10 is operable to determine the phase of the fastening operation in which the power tool 10 is operating as indicated by reference numeral 92 in Fig. 6.
  • a fastening operation of an impact tool can be broken down into two distinct phases: (1) a continuous run phase 94 and (2) an impacting phase 96.
  • Continuous run phase 94 occurs when the fastener is being run down.
  • output spindle 50 is directly coupled to the rotor (not shown) of motor 38. This phase is characterized by high-speed, continuous rotation and low output torques. When the output spindle experiences more rotational resistance from the fastener being rotated by the impact tool, the impacting phase begins.
  • impacting phase 96 output spindle 50 experiences intermittent rotations related to the operation of the impact mechanism, lower rotational speeds, and higher output torque.
  • Determining the operating phase 90 of an impact tool that uses a brushless DC motor may be performed using a number of different methods.
  • the brushless DC motor requires controller 70 (e.g., a microprocessor) to switch power on and off through the various windings of the motor with precise timing.
  • controller 70 of power tool 10 monitors the rotational position and/or speed of motor 70.
  • power tool 10 may include one or more sensors to measure an amount of electrical current going through the motor windings. The sensed current may be used to determine the operational phase of the power tool 10 or it may be used to shut the motor off if the current becomes dangerously high.
  • the operating phase of the power tool 10 is determined by analyzing the current of the electric motor. For example, as illustrated in charts 100 and 120 in FIGS. 7 and 8, respectively, during the impacting phase, the motor draws more current than during the continuous run phase. At the beginning of a fastening operation, when the motor begins rotating, there is an initial spike 106 and 126, respectively, in the current supplied to the motor. After the motor is rotating at full speed, the current required to maintain the speed of rotation of the motor is relatively low. Once the power tool 10 starts impacting, the current sharply rises because the load applied to the motor becomes greater due to the operation of the impacting mechanism.
  • the various operational phases of the power tool 10 can be determined by monitoring for the rise in current drawn by the motor during the impacting phase.
  • the power tool 10 includes several operational modes selectable by the user through a user interface. These operational modes control the power output of the motor based on the phase of operation of the power tool 10. For example, if the power tool 10 is in a reduced power mode, full power will be delivered to motor during the continuous run phase and a reduced amount of power will be delivered to the motor during the impact phase.
  • the user interface that is operable to select the various operational modes is knob 42 positioned on rear portion 18 of the power tool 10.
  • Each position of knob 42 corresponds to a particular user-selectable operational mode.
  • the power tool 10 may include any number and type of sensors (e.g., Hall-effect sensors, potentiometers, etc.) to convey the position of knob 42 to controller 70.
  • the power tool 10 includes four operational modes: a standard mode, a reduced power mode, a torque stick stability mode, and a snug-up mode. It will be appreciated that, in other embodiments, the power tool 10 may be provided with more or less than four operational modes.
  • the standard mode allows the user to operate the power tool 10 at full speed and full torque output during both the continuous run phase and the impacting phase.
  • the standard mode gives the user full control of the power tool 10 through the trigger, but does not provide any particular protection against over-torqueing a fastener driven by the impact tool.
  • the reduced power mode allows the power tool 10 to operate at full speed when the fastener is being run down, for example, in the continuous run phase.
  • the controller reduces the power supplied by the motor, thereby reducing the rotation speed and the output torque of the output spindle.
  • chart 100 in FIG. 7, that plots motor current 102 over time 104 when in the reduced power mode, the controller allows the motor to operate at full speed when the current through the motor is relatively low, as it normally would be when the fastener is being run down indicated at 108.
  • the current through the motor rises sharply as indicated at 110, which indicates to controller 70 that the impacting phase has begun and that the motor power shall be reduced.
  • the reduced power mode allows the user to limit the torque applied to the fastener by the power tool 10 without having to manually reduce the power delivered by the power tool 10 (e.g., by easing off trigger 36) after the fastener has been run down and begins to tighten.
  • the torque stick stability mode may operate similarly to the reduced power mode described above.
  • the torque stick stability mode is designed to reduce the vibrations or limit erratic oscillations of the impact mechanism when a torque stick or other extending apparatus is attached to output spindle 50.
  • the spring action of the torque stick or extension may cause the impact mechanism to oscillate in an erratic and unpredictable manner. This may cause the tool to vibrate excessively, it may cause discomfort to the user, it may cause excessive wear of the impact mechanism, or it may adversely affect the torque output of the power tool 10.
  • the controller may be configured to avoid specific operating speeds or bands of speeds that tend to excite oscillations. These speeds might be identified analytically or experimentally.
  • the snug-up mode allows the power tool 10 to rundown the fastener at a predetermined speed during the continuous run phase.
  • the run-down speed during the snug-up mode is less than the full speed of the motor.
  • controller 70 allows motor 38 to operate at a predetermined speed when the current through the motor is relatively low, as it normally would be when the fastener is being run down at 128.
  • the snug-up mode allows the user to apply a relatively small amount of torque to the fastener without adversely affecting the overall speed of the fastening operation. In some situations, the snug-up mode may allow the user to apply the final torque to the fastener with a hand operated wrench for fasteners where the amount of torque is critical.
  • One advantage of the above mentioned user-selected operational modes is that the fastening speed of the power tool 10 is maintained during rundown, while the final torque applied to a fastener by the power tool 10 is limited.
  • the operating phase of the fastening operation may be determined by detecting the speed of rotation of the motor.
  • Monitoring motor speed may be accomplished by monitoring the frequency of the back electromagnetic field ("back EMF") coming from the motor, monitoring the output of an encoder positioned near the motor rotor, monitoring the output of a resolver positioned on the motor rotor, or monitoring the output of Hall-effect sensors positioned in close proximity to the rotor magnets of the brushless DC motor.
  • Controller 70 may determine when the motor has decelerated due to an increased motor load (e.g., because the power tool 10 is now impacting).
  • a motor drive can determine an abrupt change in motor torque by monitoring the control loop error values. As the motor load abruptly changes, the control loop error will increase dramatically indicating that the mechanism has begun to impact.
  • the controller can monitor battery voltage. As the motor load and current draw of the motor increase, the internal resistance of the battery will cause its voltage to drop indicating that the mechanism is impacting.
  • the controller may monitor the output signals of a microphone positioned in the power tool 10. When the mechanism begins to impact, the noise generated by the impact mechanism will be received by the microphone, which will generate an output signal sent to controller 70.
  • a sensor may be installed in or near the impact mechanism to determine if the hammer has moved axially rearward.
  • This sensor might be embodied as a Hall-effect sensor, a linear variable differential transformer (LVDT), or a microswitch.
  • a torque sensor may be installed between the motor and impact mechanism. When the measured torque increases dramatically, it indicates to the controller that the mechanism is impacting.
  • Other types of sensors installed on the power tool 10 may include an anvil angle encoder, a hammer angle sensor, a hammer axial travel senor, an accelerometer on the hammer, a motor brush bounce sensor configured to detect brief interrupts caused when a brush leaves the commutator of the motor, a cone clutch integrated into the front of the power tool 10 configured to begin slipping at a preset torque, or a sensor to detect small torsional vibrations to determine the socket angle. It is contemplated that any of these feedback mechanisms (including any combination the feedback mechanisms mentioned above) may be used to monitor the operating phase of the power tool 10 in various embodiments.
  • the power tool 10 may include other user-selectable operation modes.
  • the power tool 10 may include a snug-up soft mode which includes rotating output spindle 50 at full speed during the continuous run phase, followed by impacting the output spindle at a reduced power for a fixed amount of time during the impacting phase.
  • power tool 10 may include any of the modes as described above but concluded with a number of impacts in a reverse direction.
  • power tool 10 may include a low torque or continuous mode where power tool 10 stays in the continuous run phase and never enters the impacting phase of the fastening operation.
  • power tool 10 may include a cross thread mode where, at the beginning of the continuous run phase, output spindle 50 rotates at a slow speed for a time period (or for a number of rotations) to ensure that the fastener being fastened is not cross threaded before the output spindle begins rotating at full speed.
  • the controller may run the motor at a reduced speed while the fastener is being run down and shut off the motor immediately as the load on the motor increases to prevent any impacting from the mechanism, allowing power tool 10 to be used as a direct drive tool.
  • the power tool 10 may include user-selected operational modes tailored to specific industrial applications, such as tire changing, decking, steel erection, line work, or other industrial applications.
  • various embodiments of the power tool 10 may include any combination of the operational modes described in the present disclosure. These various embodiments of power tool 10 may be mechanically identical but include different software (implementing different combinations of the operational modes), allowing for a diverse product line at reduced cost of product design and manufacturing.

Abstract

Une machine portative à moteur tenue à la main comprend un ensemble logement, un axe de sortie, et un flasque palier de moteur. L'ensemble logement supporte un moteur électrique conçu pour tourner lorsque le moteur est alimenté en énergie. L'axe de sortie fait saillie depuis une extrémité de sortie du logement, et est fonctionnellement accouplé au rotor de telle sorte que l'axe de sortie tourne en réponse à une rotation du rotor. Le flasque palier de moteur est situé sur l'ensemble logement adjacent au moteur électrique et à l'opposé de l'axe de sortie. Un dispositif de commande donné à titre d'exemple peut être utilisé pour déterminer des phases d'une opération de fixation dans laquelle la machine portative à moteur tenue à la main fonctionne. Les phases de l'opération de fixation de la machine portative à moteur tenue à la main comprennent deux phases comprenant : (1) une phase d'exécution continue et (2) une phase de percussion.
PCT/US2016/035807 2015-06-05 2016-06-03 Machines portatives à moteur à modes de fonctionnement sélectionnables par l'utilisateur WO2016196984A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201680031738.1A CN107635726A (zh) 2015-06-05 2016-06-03 具有用户可选择操作模式的动力工具
EP16804555.7A EP3302882B1 (fr) 2015-06-05 2016-06-03 Machines portatives à moteur à modes de fonctionnement sélectionnables par l'utilisateur

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201562171504P 2015-06-05 2015-06-05
US62/171,504 2015-06-05
US15/172,501 2016-06-03
US15/172,501 US11491616B2 (en) 2015-06-05 2016-06-03 Power tools with user-selectable operational modes

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CN110621445A (zh) * 2017-03-21 2019-12-27 罗伯特·博世有限公司 电动手持式工具的预测性检验
CN113474124A (zh) * 2018-12-04 2021-10-01 凯特克分部尤尼克斯公司 用于拧紧螺纹紧固件的装置
WO2023016811A1 (fr) * 2021-08-09 2023-02-16 Robert Bosch Gmbh Procédé de commande d'outil électrique portatif

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JP6128037B2 (ja) * 2014-03-28 2017-05-17 日立工機株式会社 電動工具
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